I use Jellyfin, and it works good enough most of the times. Sometimes it just won't find subtitles, or metadata and it's highly annoying to fix it. The TV app is a bit rough sometimes. The android app feels very barebones. The HDR tone mapping is either horrible or non-existent (can't remember which, but I could never play proper HDR).

So yeah, there are a lot of rough edges, but I think this is the best on offer if you want a true self-hosted media library that mostly works out of the box across various platforms.